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(ART- O43-
SERVICE MANUAL
STEREO RECEIVER
ex -1010 KCU, F, GN
NOTE:
MODEL SX- I0I0 COMES IN THREE VERSIONS DISTINGUISHED AS FOLLOWS:
Round label on Voltage Type
rear panel
KCU 120V only UL (U. ) and CSA (Canada) approved.
llOV , 120V , 130V General export model.
220V and 240V
(Switchable)
220V only SEMCO (Sweden), NEMCO (Norway),
DEMCO (Denmark) approved.
(74BO2M61 D) C,D PIONEER~
8X- 1C10
CONTENTS
About 220V only model labeled " GNu
This model whose rear panel is labeled " GNu circular mark operates only on 220V
substantially in its circuit design from two other models. When repairing this model
please see the manual on page 75 and the followings which include such items as Circuit
connection diagram , Miscellaneous parts list , Schematic diagram of power supply circuit
assembly, P. C. board pattern and its parts list.
Before servicing, also please do not fail to check to see if the " GN" mark is labeled on the
rear panel.
SPECIFICATIONS...............................................
FRONT PANEL FACILITIES .................,.................... 5
CONNECTION DIAGRAM ..........................,............. 7
BLOCK DIAGRAM.......................................... ....
CIRCUIT DESCRIPTION .........................................
DIAL CORD STRINGING..................................... ....
DISASSEMBLY .................................................
PARTSANDP. BOARDLOCATIONS............................. 14
LEVEL DIAGRAM..................... .........................
10. ALIGNMENT PROCEDURE
10. 1 English...................................................
10. Abgleichverfahren ..........................................
11. EXPLODEDVIEWANDPARTSUST............................... 20
12. SCHEMATIC DIAGRAMS , P. C. BOARD PATTERNS AND
PARTS LIST
12. Circuit Connection Diagram and Miscellaneous Parts.
12. 2 FM Front End (AWB-017).................................... 32
12. 3 Tuner Assembly (AWE- 040)................................... 33
12.4 Muting Circuit Assembly (AWM- O39)........................ ....
12. Equalizer Amplifier Assembly (AWF- 013) . . . . . . . . . . . . . . . . . . . . . . ..
12. 6 Control AmplifierAssembly(AWG- O27)..................... ....
12. 7 Power Amplifier Assembly (AWH- O32) .. . . . . . . . . . . . . . . . . . . . . . . ..
12. Protection Circuit Assembly (AWM- 062) . . . . . . . . . . . . . . . . . . . . . . . ..
12. 9 Power Supply Circuit Assembly (AWR- 053) .. . . .
12. 10 Power Supply Circuit Assembly (AWR- O54) . . . . . . . . . . . . . . . . . . . . ..
12. 11 Switch Circuit Assembly (AWS- 064) ............................
12. 12 Switch Circuit Assembly (AWS- 068) ............................
12. 13 Switch Circuit Assembly (AWS- 069) ............................
12. 14 Switch Circuit Assembly (AWS-070) ............................
12. 15 Switch Circuit Assembly (AWS- 071) ............................
12. 16 Switch Circuit Assembly (AWS- O72) ............................
12. 17 5PConnectorAssembly(AWX- 062) ............................
13. PACKiNG METHOD AND PART NUMBERS .......................... 71
14. SCHEMATIC DiAGRAMS , P. C. BOARD PATTERNS AND
PARTS LIST FOR 220V ONLY MODEL
14. 1 Circuit Connection Diagram and Miscellaneous Parts. . . . . . . . . . . . . . . .. 75
14. 2 Power Supply Circuit Assembly (AWR- 063) . . . . . . . . . . . . . . . . . . . . . ..
1" SPECI FI CATIONS
SEM!CONDUCTORS
EETs ...................................................... 3
ICs ......................................................... 5
Transistors ............................................. 73
Diodes ................................................... 41
AMPLIFIER SECTION
Continuous Power Output
20Hz~20kHz
(Both channels driven) .................. WOW + 100W (8,Q), W5W + 105W (4,Q)
1kHz (Both channels driven) ......... 110W + 110W (S,Q), 110W + 110W (4,Q)
Harmonic Distortion
(20Hz~20kHz Continuous
Power Output) .............................. Less than 0.
(IW + 1W , Power Output) ............ Less than 0. 05%
I ntermodulation Distortion
(Continuous Power Output) ......... Less than 0.
(IW + 1W , Power Output) ............ Less than 0. 05%
Power Bandwidth
(I H F , Both channels driven) ......... 5Hz~40kHz (T. D. 0. 1%)
Frequency Response ........................... 7Hz~100kHz
I nput Sensitivity/I mpedance
POVlfER AMP IN ........................... 1V/50k,Q
Output
Speaker ............................................. A , B , C , A + B , A + C , B + C (4,Q~16,Q)
Headphone 4,Q~16,Q
Damping Factor
(1 kHz 8,Q) .................................... More than 50
Hum & Noise
(IHF , short-circuited
A Network) .................................... More than 100dB
Residual Hum & Noise
(S,Q , Pre & Power amplifier) ......... Less than 1 mV
PR IEAMPLI FI E R SECTION
Input Sensitivity/I mpedance
PHONO 1 ....................................... 2. 5mV /50k,Q
PHONO 2 ....................................... 2. 5mV/50k,Q
PHONO Overload Level
(rms/p- 250mV!700mV
MIC 0mV /50k,Q
AUX 150mV/70kD
TAPEPB1 150m V /70k,Q
TAPE PB 2 (D I N connector) 150mV!70k,Q
Output Level/I mpedance
TAPEREC1 150mV
TAPE REC 2 (DIN connector) ...... 30m V /80k,Q
PRE OUT 1V/1k,Q
Harmonic Distortion
(20Hz~20kHz) .............................. Less than 0.
SX- 1 01 0
Frequency Response AM SECTION
PHONO (RIAA equalization)......... 30Hz~15kHz :!:O. 3dB Sensitivity
AUX , TAPE PB 10Hz~40kH(~ dB (I H F , Ferrite antena) 300l1V /m
Tone Control (IHF , Ext. antenna) 1511V
BASS: Selectivity................ 40dB
MAIN :!:10dB (100Hz) Signal- to- Noise Ratio 50dB
SUB :!:5dB (50Hz) I mage Rejection 65dB
TREBLE: I F Rejection 85dB
MAIN :!:10dB (10kHz) MISCELLANEOUS
SUB :!:5dB (20kHz) Power Requirements AC 120V 60Hz or 110 , 120 , 130 220 and 240V
Filter (switchable) 50/60Hz
LOW CUT 8dB (50Hz) 6dB/oct. Power Consumption 400W (UL approved model only)
HIGH CUT 9dB (10kHz) 6dB/oct. 640W (5 line Voltage model only)
Loudness Contour Dimensions 520 (W) x 175 (H) x 440 (D) mm
(Volume control set at 20- 1/2 x 6- 7/8 x 17- 5/16 in.
40dB position) +8dB (100Hz), +4dB (10kHz) Weight:
Hum & Noise Without Package 22. 2 kg (48 Ib 13 oz)
(IHF , short-circuited With Package 26. 6 kg (58 Ib 8 oz)
A Network) FURNISHED PARTS
PHONO More than 70dB FM T- type Antenna
MIC ..... More than 65dB Operating Instructions
AUX , TAPE PB More than 95dB Fuse 6A
Muting 20dB ~ (5- line voltage model only)
Fuse 3A
FM SECTION
Usable Sensitivity (I H F) 1.711V NOTE:
Capture Ratio (IHF) 0dB Specifications and the design subject to possible modification without notice due to improvements.
Selectivity (IHF) 90dB
Signal- to- Noise Ratio 72dB
Image Rejection (98MHz) 110dB
I F Rejection (98MHz) 110dB
Spurious Rejection 11 Od B
AM Suppression ...... 55dB
Harmonic Distortion:
MONO Less than 0.
STEREO Less than 0.
Frequency Response 20Hz~15kHz~g:6 dB
50Hz~10kHz~g:g dB
Stereo Separation
1kHz More than 40dB
50Hz~10kHz More than 30dB
Sub Carrier Suppression 65dB
Antenna Input 300,Q Balanced 75,Q Unbalanced
Muting ON- OFF
FRONT PANEL FACiliTIES
SIGNAL METER FM TUNING METER FUNCTION SELECTOR BUTTONS
FRONT PANEL FACILITIES For AM and FM station tunings While getting the SIGNAL meter needle going to the right For selecting the program source , push each button as
AM tuning: Tune the dial pointer so that the SIGNAL make fine adjustment with the FM TUNING meter whose follows:
SPEAKER BUTTONS needle comes to the center (indicating the optimum AM.. For AM broadcast reception.
meter needle comes to the extreme right.
Each of speaker systems A , B , and C is connected to each reception). For FM broadcast reception. The
FM tuning: Both the SIGNAL and FM TUNING
of output terminals A , B , and C. STEREO indicator lights up when the
meters work together. The optimum -FM STEREO INDICATOR
By pushing the following:
point of the SIGNAL meter needle is the broadcast is in stereo.
SPKR- A .... Speaker systems A into operation TUNING KNOB PHONO 1 .. For operating a turntable connected to
same as in AM tuning. Then use the FM
SPKR- B .... Speaker systems B into operation the PHONO 1 input jacks.
TUNING meter.
SPKR- C .... Speaker systems C into operation PHONO 2 For operating a turntable connected to
the PHONO 2 input jacks.
NOTES:
1. Whenanytwopairsofthebuttons(A+B B+C C+A)are MIC For using a microphone. Not possible to
depressed , the corresponding pairs of speaker systems ;"iIl mix with other program source.
"'"'0 """"'" -do. ". .0'0
come into operation. However, operating all three button" AUX For listening to audio equipment (car-
even though depressed at the same time is not possible. tridge tape player , TV sound tuner , etc.
2. Only when listening through headphones, press again the connected to the ALJX input jacks.
SPKR button(s) in us" to OFF (undepressed) from the ON
position (pressed). DIMMER SWITCH
POWER SWITCH Dims the brightness of the indicator light. Press again to
Turn this switch ON but wait for some 3 to 6 seconds restore full brightness.
during the silence of which the protection circuit elimi- FM MUTING BUTTON
nates the unpleasant noise not imputed to a receiver fault. Leave this button undepressed (in the ON position) while
tuning in FM stations. Inter-station noise may interfere
PHONES (1 , 2) OUTPUT JACKS with FM reception while tuning between stations. To
suppress this noise , leave the MUTING button undepress-
Accept two pairs of headphones.
ed (in the ON position). If the low signal strength is due
BASS CONTROLS to distance from the transmitter or other influences
Adjust bass tone quality. depress this button , at which the weak station will be
100Hz. . .. For the low frequencies below 400Hz. heard with the MUTING " OFF.
Possible up to lOdB of increasing or
reducing at 100Hz in 2dB steps.
MODE BUTTON
50Hz. . . . . . After adjustment by the 100Hz control Leave this button undepressed (if necessary, depress this
further adjust frequencies below 80Hz by AUDIO MUTING BUTTON - 20dB BALANCE CONTROL to release it when already depressed) for STEREO
this control , if necessary. Possible up to Depress this button to mute the audio input to - 20dB. Adjusts the balance between the sound volume from the playback. For MONO playback , depress it. In this case
5dB of increasing or reducing in bass No need to turn down the VOLUME control on each left and right speaker systems. stereo signals for left and right channels will be mixed into
response at 50Hz in 2. 5dB steps. occasion for your convenience. DOLBY NR ADAPTOR SWITCH mono signal which will be heard from the center of both
speaker systems.
LOW CUT , HIGH CUT BUTTONS TREBLE CONTROLS When employing Dolby Noise Reduction Adaptor , depress
LOW. motor or other rumble (turntable
pitched
When the low-
source) is obtrusive , de-
Adjust treble tone quality.
10KHz .. For the high frequencies above 2. 5kHz.
this DOLBY NR ADAPTOR to ON. LOUDNESS BUTTON
Depress this button to listen at low volume. The human
4CH ADAPTOR SWITCH
press the LOW CUT button to ON. In no Possible up to 10dB of increasing or ear s frequency response varies according to the listening
When using the 4-channel rear amplifier connected to the
interference , leave it undepressed (OFF). reducing in treble response at 10kHz in volume. The depressed button compensates for hearing
4CH jacks on the rear panel , depress this 4CH ADAPTOR
HIGH When the high frequency scratch noise 2d B steps. response with emphasis on the bass and treble.
to ON.
(records or other source) is much , depress 20KHz .. After adjustment by the 10KHz control
MIC INPUT JACKS
this button to ON. In no interference further adjust frequencies above 12KHz TAPE MONITOR (1 2) SWITCHES
, R . . . .. For connecting the left and right channel
leave it undepressed (OFF). by this control, if necessary. Possible up Monitor the recorded sound while recording with a tape
microphones.
to 5dB of increasing or reducing in treble deck. Also possible to play back tapes as follows:
TONE SWITCH response at 20kHz in 2. 5dB steps. 1 . . . With a tape deck connected to the TAPE NOTE:
When in the ON (up) position , this switch causes the 1 jacks (REC and PB), either monitoring Use the high impedance (above 20M2) with 6mm diam. phone
amplifier section to operate with a flat frequency regard-
TAPE DUPLICATE SWITCH plug,.
of recording in progress or playing back is
less of the tone control settings. Use this switch to check Leave this switch in the ON (down) position to duplicate possible. VOLUME CONTROL
the audio characteristics of your listening room such as or edit a recorded tape using two tape decks. For normal
. .. With a tape deck connected to the TAPE outputs from the
use , switch over to the OFF (up) position. Governs both the volume of sound
when it is necessary to check the tone quality of phono 2 jacks (REC and PB or REC/PB con- speaker systems and from the headphones.
cartridges and speakers and also to particularly set the nector), the same as in 1 above is possi-
tone controls to be assessed. ble.
(!)
SX- 1 01 0
CONNECTION DIAGRAM
OUTDOOR TYPE FM CARTRIDGE TAPE DECK
FM ANTENNA ANTENNA ANTENNA TURNTABLE TURNTABLE TAPE PLAYER (open-reel , cassette) TAPE DECK
LINE LINE LINE LINE
INPUT OUTPUT INPUT OUTPUT
300n feeder
75n :
coaxial:
cable Playback/Recording Cord (DIN- type)
GROUND
For connecting For connecting
4-channel discrete Dolby NR
FM broadcast adaptor adaptor
FUSE
For connecting
channel adaptor
FM DE- EMPHASIS SWITCH
I n some countries . the receiver PRE/POWER AMP
is delivered with a selector switch The bridge/connecting plugs
for adjusting the FM de- emphasis between PRE OUT and POWER
from 50 to 75!lsec. If your unit I N jacks should always be left in
is equipped with such a switch position in normal use. If they
on the rear panel ,
and if the high are disconnected or removed , no
sound range gives an impression sound will come from the speak-
of weakness move the de-em- ers.
phasis switch to its other posi- Always be sure to cut the power
(A)
tion. supply before attempting to re-
move them.
- R CH L CH R CH L CH R CH
(B) (C) L
SPEAKER SYSTEMS
,?,,' ~ ~ ~" --" "
BLOCK DIAGRAM
4 CH MPX OUT
(C?)
':~~CED
FM
L".-i1CED
~~L
l) Stabilizer
to Tuner
S18
::rll""
AF section
S19
SWiTCH
MUTiNG
SIQ a::a::
'-----v----'
J~~~""'
to Power amplifier
r "",
CL.
or:-'
iDh: Stabilizer d:c Regurator
AUX
CO r-
a:: CL.
CO r-
a:: CL. 0- 0-
r- co
::0 "" 2 ~6~-'2
::00
S'0a S11 a
S'40
MIC
or: MIC
-Q-Q-
:r:
PHONO 2 (0
' Sl1b
AUX
, 0--
Sa:: 2 r- 2
::0 -
SWITCHES' a:: - CL.
i'cl co
a:: N CL. 0 ~- 'C ~gj-!
S 1 FUNCTION S i1 LOUDNESS L w.J
CL.
L w..J
CL.
L 8-!
S2 S 14 TONE DEFEAT ';)h:
S3 S15 LOW FILTER :r:
PHONO 1
S4 PHONO 2 S 16 HIGH fILTER
S5 MIC S 17 AUDIO MUTING
AUX S 18 DIMMER
DUPUCATE
TAPE MONITOR 1
TAPE MONITOR 2
SlO 4 CH ADAPTOR
SI1 DOLBY NR ADAPTOR
S"
S 19 FM MUTING
S 20 SPEAKER A
S22
S 23 POWER
S,Z MODE
SX- 1 01 0
It incorporates an independent differential
CIRCUIT DESCRIPTION circuit in the first stage of the equalizer
amplifier whose DC supply uses twin plus
and minus.
SIGNAL PATH 7. The output from the equalizer amplifier
1. The FM broadcast signal waveform from the together with that from the AUX terminal
jacks , the audio signal from the AM tuner
antenna is fed to the two dual- gate MOS
field-effect transistors in the front end for and the audio signal from the FM tuner , are
radio frequency amplification. This signal is all selected by the FUNCTION switch , and
converted into an intermediate frequency by pass through the switch circuits for TAPE
DUPLICATE , TAPE MONITOR , 4 CH
the dual- gate MOS FET mixer stage in com-
signal from the local oscil-
ADAPTOR DOLBY NR ADAPTOR , and
bination with the
lator. the circuits for BALANCE and VOLUME
2. The intermediate frequency signal , con-
controls , before being fed to the control
verted within the front end , is fed to four amplifier.
8. The control amplifier has an extremely high
ceramic filters and three ICs , where it is input impedance , using PNP and NPN tran-
tuned , amplified , and detected , becoming a
audio frequency (composite) signal.
sistors in a direct-coupled two- stage circuit.
This greatly reduces the influence of the
The composite signal following detection is
fed to the 4 CH MPX terminal jack and the performance inherent in equipment con-
multiplex decoder stage. nected externally.
3. The multiplex decoder stage uses one IC for The output from this two- stage direct-
three functions: to demodulate the com- coupled circuit is divided into two circuit
posite signal into the left and right channel systems.
stereo signals , to operate the automatic One goes to the TONE switch via the twin
mode switching between stereo/mono , and tone control circuit , and the other goes
to switch the stereo indicator lamp appro- directly and unmodified in any way .to the
priately. TONE switch. The TONE switch selects
The decoding system uses a phase locked between them.
loop (PLL) circuit , which assures continuous 9. The amplifier section of the twin control has
stable operation and excellent stereo sepa- closed loop NFB amplifiers for both the
ration with low susceptibility to external
main and sub circuits , each of which has its
noise (such as car ignition noise) and own transistor , eliminating mutual inter-
ambient temperature changes.
ference.
After decoding, the signal is fed to four
10. The control amplifier output is fed to the
transistors and one LC filter , where the
power amplifier after passing through the
residual carrier component (38kHz , 19kHz LOW FILTER , HIGH FILTER and AUDIO
MUTING circuits.
and SCA) is rejected , and then to the audio
amplifier section.
The first stage of the power amplifier is a
4. The FM muting circuit consists effectively of
differential amplifier element with constant
current load , and the second stage , too , uses
two circuits , designed to reduce the pulse
noise which can so easily arise when a a differential amplifier element , so that DC
potential drift is prevented.
muting circuit is operative. On the other hand , the final output stage
The one circuit is an electronic switch in- uses two power transistors in parallel in both
corporated into the IC , so that the de-
the upper and lower circuits , so that large
modulated circuit is switched off and on in collector dissipation is possible.
the IC , and the other short- circuits the audio
Again , in order to reduce the distortion
signal by means of a reed relay.
which occurs at low signal levels , the idle
5. The AM tuner section employs one mono-
current has been set at a standard level of
lithic IC which functions as radio frequency
amplifier , frequency converter , local oscil- 100mA.
lator , intermediate frequency amplifier , and 11. The power amplifier output is fed to the
detector. The output is a pure audio signal. three push buttons which form the
6. The signals which are applied to the MIC and
SPEAKER switch. This selects A , B , and C
PHONO terminal jacks are selected by the speaker system terminal connection.
FUNCTION switch before being fed to the If all three speaker systems were to
connected simultaneously, the effective
first stage of the three- stage differential
direct- coupled equalizer amplifier by which speaker impedance might be less than 4il.
the signals are amplified. To guard against this possibility, when all
In order to reduce the switch noise , the three buttons are depressed together , all
circuit configuration employed enables the three systems are disconnected from the
potential at the input and output terminals amplifier.
to be set at near zero volts. 12. The power amplifier circuit board includes a
power limiter circuit which is independent speaker complex load impedances less than
circuit. If the power transistor
of the signal , and shorts across the speaker terminals.
current exceeds the maximum rated value Their operation is such that , under the cor-
the power limiter circuit shorts the input responding abnormal condition , a relay acts
signal to protect the power transistors. to separate the output junction and the
The ' sensing ' for this protective circuit is output circuit. Further , these protective
performed by detecting the voltage drop circuits also help to mute the unwanted
across the emitter resistors of the power signal which immediately follows switching
transistors. There are also protective circuit the POWER switch ON , and to immediately
which guard against DC potentials at the disconnect the output after switched OFF.
power amplifier output junctions , against
DIAL CORD STRINGING
1. Turn the tuning capacitor so that its plates
protrude as much as possible.
2. Tie one end of the string to the spring on the
TUNING pulley (attached to the tuning
capacitor ).
3. Lead the string around pulley A , then wind
it three turns around the TUNING shaft.
4. Lead the string around pulleys B , C and D
then wind it 1- 1/2 turns around the TUN-
ING pulley.
5. Now tie the other end of the string to the
spring on the TUNING pulley. Turn the
TUNING shaft and check for proper func-
tion. Then trim the ends of the string.
6. Turn the TUNING shaft until the plates of
the variable are all the way in. Move the
pointer to the left-end starting point on the
dial and fasten it to the string in that
position.
PULLEY D
TUNING PULLEY
DIAL POINTER
. g ""' ~ ~'"" """
SX- 1 01
DISASSEMBLY
1. To remove the wooden cabinet , first remove
the two screws holding each side , then lift
the back of the wooden cabinet upward.
2. Pull off all knobs.
3. Remove the two screws in the upper edge of
the front panel and remove two nuts and
washers. Then pull the panel gently forward.
4. To remove the bottom plate , first remove
the ten screws holding it in place.
WOODEN ~i'
CABINET
FRONT PANEL
" 0
~" '0
I%~"
0 ~
:~o
~o
~~~~~M
4 0
1~
PARTS AND P. C. BOARD LOCATIONS
TOP VI EW
KNOB (POWER , TONE , DUPLICATE PHONO JACK- B (6 JACKS)
MONITOR , 4 CH ADAPTOR , NR ADAPTOR) AKB- 017-
AA D- 040-
PHONO JACK- A (4 JACKS)
AKB- 014-
FRONT PANEL ASSEMBLY ELECTROLYTIC CAPACITOR
ANB- 255- 000 IlF /63V
ACH- 037-
POWER SUPPLY
TUNER ASSEMBLY CIRCUIT ASSEMBLY
AWE- 040- AWR- 053-
POWER TRANSFORMER
RELAY ATT- 166- A (KCU)
ASR- 002- ATT- 174- 0 (F)
C3)
C3)
TUNING POWER AMPLIFIER
PU LLEY ASSEMBL Y
ASSEMBL Y AWH- 032-
TUNING SHAFT AXA- 015- EQUALIZER ANTENNA TERMINAL
ASSEMBL Y AMPLIFIER ASSEMBLY BOARD
AXA- 056- AWF- 013- 0 AKA- 002-
KNOB (TUNING) FM FRONT END MUTING CIRCUIT ASSEMBLY
AAA- 026- AWB- 017- AWM- 039-
g=
BOTTOM VIEW
KNOB (BASS- MAIN , TREBLE- MAIN FERRITE LOOPSTICK ANTENNA
VOLUME , BALANCE) ATB- O27-
AAB- 068-
SWITCH CIRCUIT ASSEMBLY FERRITE ANTENNA
AWS- 072- HOLDER ASSEMBLY
W72- 092-
SWITCH CIRCUIT ASSEMBLY
AWS- 069-
PROTECTION CIRCUIT ASSEMBLY
AWM- 062-
ill =
0 ~!
0 I~
OJ CJ
OJ
0 ~~
0 0
0CD i~
69 0
(g) CJ
POWER SUPPLY FUSE HOLDER
CIRCUIT ASSEMBLY AKR- 012- 0 (KCU)
AWR- 054- AKR- 001- 0 (F)
CONTROL AMPLIFIER ASSEMBLY
AWG- 027-
AC POWER CORD
LEVER SWITCH (POWER) ADG- 005-
ASK- 080- 0 (KCU)
ASK- 081- 0 (F)
SPEAKE R OUTPUT TE RM I NAL
KNOB (BASS-SUB , TREBLE-SUB) AKE- O14-
AA B- 069-
SX- 1 01 0
lEVEL DIAGRAM
LOWe.
AUX
HIGH FILTER
PHONO -
MIC SPEAKERS
I EQUALIZER : CONTROL : POWER AMP
I AMP uWI AMP HEADPHONES
...J...J I
c:::r
CD::;:" I
SPEAKE
30.5V/ 8D.
(116W
l()
HEADP HONES
73V
II)
l()
r--:
fg -10
1* "U
...J
AUX 15OmJ
-20
...J
-30
CD!D
10 r--:
I'C'1 r0
-50 PHONO 25m\!
!.IIC 2mll
-60 FREQUENCY 1kHz
:~ ~ " "
10. ALIGNMENT PROCEDURE
10. ENGLISH
ALIGNING THE FM SECTION
1. SX- 1010 Control Settings
Set the controls (knob and switches) of the SX- 1010 as follows:
POWER:
FUNCTION: FM
FM MUTING: OFF
2. Connections between Test Equipment and the SX- 1010
. The output from an FM signal generator should be connected to the 300Q antenna terminals
of the SX- 1010.
. A distortion meter should be connected to the TAPE REC terminal jacks on the SX- I010.
. An AC millivolt meter should be connected to the TAPE REC terminal jacks on the SX- 1010
in parallel with the distortion meter.
kHz.
3. Set both the FM signal generator and the SX- 1010 to indicate 98MHz.
4. Turn the FM signal generator output level down to minimum.
5. Turn the lower core and adjust so that the TUNING meter needle is centered.---r
6. Increase the FM signal generator output to 60dB , modulated at 400Hz , with a deviation of :1:75
7. Turn the upper core and adjust so that the distortion is at a minimum.
Steps 4 ~ 7 above should be repeated several times in succession , until no significant improve-
ment is obtained.
" 0" aa""a (Z)
~&J c Ie
:~ 8
(1)
c" " 0)" " c c 0"
8. Set the FM signal generator output level to 10dB , modulated at 400Hz , with a frequency devia-
tion of :1:75 kHz.
9. Adjust for maximum output at 90MHz.
10. Adjust for maximum output at 106MHz.
11. Adjust for maximum output at 90MHz.
12. Adjust for maximum output at 106MHz.
Steps 11 ~ 12 above should be repeated several times in succession , until no further significant
impmvomenti, ob',;ned.
i 0 0
0 &
r $
1(
e,f
I~t
0 0 = 0
ALIGNING THE FM MPX SECTION
Note: This set of adjustments should not be carried out until the alignment of the FM section
(1 ~ 12 above) has been completed.
The multiplex signal generator should be connected to the external modulator terminals
of the FM signal generator.
1. SX- 1010 Control Settings
Set the controls (knob and switches) of the SX- 1010 as follows:
POWER:
FUNCTION: FM
FM MUTING: OFF
2. Connections between the Test Equipment and the SX- 1010
. The output from the FM signal generator should be connected to the 300,Q antenna
terminals of the SX- 1010.
. The oscilloscope X plates (horizontal inputs) should be connected to the PILOT OUT
terminals on the MPX signal generator , and the Y plates (vertical inputs) to terminal number
24.
. The AC millivolt meter should be connected to the TAPE REC terminals (with changeover
possible from L to R channels).
3. Multiplex Signal Generator Modulation
L + R (1kHz): 67. 5kHz deviation
PILOT (19kHz): 7. 5kHz deviation
4. Set the FM signal generator output to minimum.
5. Adjust for a stationary Lissajous waveform on the oscilloscope.
6. Reset the FM signal generator to 60dB level output , and modulate either the L or R channel.
7. Adjust for the maximum separation.
aocco 0
:~ 8
~D
a a
SX- 1 01 0
ALIGNING THE AM SECTION
1. SX- 1010 Control Settings
Set the controls (knob and switch) of the SX- 1010 as follows:
POWER:
FUNCTION: AM
2. Connections between Test Equipment and the SX- 1010
. Connect the AM signal generator to the AM antenna terminals (in series with a 1k,Q
dummy resistor).
. Connect the AC millivolt meter to the TAPE REC terminal jacks.
3. Set the AM signal generator to 30% modulation at 400Hz.
4. Set the AM signal generator output to 30dB at 600kHz.
Adjust for maximum output (Carry out the ferrite loopstick antenna core adjustment at the
same time).
-5. Adjust for maximum output with the frequency set at 1 400kHz.
Adjustments 4 ~ 5 above should be repeated several times until no further significant improve-
ment is obtained.
. Connect the AM signal generator directly to the AM ANT (antenna) terminals.
7. With a frequency of 1 400kHz and an AM signal generator output of 36dB , adjust for a low
of 310mV.
frequency output of 70mV.
8. With an AM signal generator output of 80dB , adjust for a low frequency output of
",,"c" ~
(0)
" a a 0
" CD a
ALIGNING THE POWER AMPLIFIER SECTION
Note: There are individual circuit boards for the Rand L channels. The following instructions
apply to both channels (boards) and should be carried out for each in turn.
1. Nothing should be connected to the input jacks of the SX- 101O , and an 8.\1 dummy resistor
should be connected across the speaker terminals.
2. A DC millivolt meter should be connected across between terminal number 19 and earth.
3. Adjustment should be made to bring the voltage to zero.
4. The DC voltmeter should be connected between terminals number 14 and 16.
5. Adjustment should be made to bring the voltage to 50m
11 . EXPLODED VIEW AND PARTS LIST
NOTE:
Parts number is subject to change for the purpose of improvement
with notice of a service bulletin.
Service bulletin will be furnished whenever necessary and you are
requested to amend parts number in this manual according to the
instructions.
Parts List of Exploded View-
NOTICE: Any parts asterisked(* ) are subject to being not supplied.
Key No. Description Part No.
Power transformer ATT- 166- KCU
Power transformer ATT- 174-
Power transformer ATT- 179-
Sub-chassis AN F- 242-
Shield cover ANH- 213-
Tuner assembly AWE- O40-
Tuner assembly- held metal AN F- 244-
Tuner assembly- held metal AN F- 244-
Electrolytic capacitor 18 00011F 63V ACH- 037-
Power amplifier assembly AWH- 032-
Power supply circuit assembly A\llJR- 053- KCU, F
Power supply circuit assembly AWR- 063-
Muting circuit assembly AWM- 039-
Screw M4X15 ABA- OlO-
Washer B21- 011-
Wooden cabinet assembly AMM- 034-
14* Heat sink ANH- 205-
15* Heat sink- held metal AI\! F- 231-
16* Heat sink- held metal AN F- 232-
17* Shield cover ANH- 212-
Equalizer amplifier assembly AWF- 013-
19* C. board holder AEB- 019-
FM front end AWB- 017-
Tuning pulley assembly AXA- 015-
Ground terminal strip (2P) K13- 048-
23* Wire clip AEC- 064-
Ground terminal strip (4P) K13- 047-
25* Wire supporter AEC- 151-
Protection circuit assembly AWM- 062-
Power supply circuit assembly AWR- 054-
Ground terminal strip (4P) K13- 047-
29* Wire clip AEC- 004-
30* Chassis ANA- 067-
Relay ASR- 002-
32* Bottom plate AN E- 056-
Foot AEC- 027-
;:::; ~ ...
c..
c..
c::::
Ci)'
,- ,-
Parts List of Exploded View- NOTE:
Parts number is subject to change for the purpose of improvement
with notice of a service bulletin.
Service bulletin will be furnished whenever necessary and you are
requested to amend parts number in this manual according to the
instructions.
NOTICE: Any parts asterisked(* ) are subject to being not supplied.
Key No. Description Part No. Key No. Description Part No.
Dial scale AAG- O72- 41 * Pulley AEC- 153-
Dial scale- held metal AN F- 243- Rubber bracket AEB- 057-
Dial pointer AAF- 031- Pilot lamp 8V , 50 mA (position) AEL- O23-
Meter (Signal & tuning) AAW- 029- 44* Lamp holder AN G- 099-
Lamp Box ANH- 211- 45* Pulley- held metal ANG- 102-
Lamp holder ANG- 097-
Pilot lamp socket AKK- 002- 46* Pulley AEC- 101-
Pilot lamp 8V , 0. 3A (meter) AEL- 015- Rubber bracket AEB- 057-
C. board cover ANG- 100- Rubber bracket AEB- O58-
Lamp board assembly AWX-◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo